By Clare Jim and Clare Baldwin HONG KONG (Reuters) - Leaders of Hong Kong's Occupy Central movement surrendered to police on Wednesday for their role in democracy protests that the government has deemed illegal, the latest sign that the civil disobedience campaign may be running out of steam. Three founders turned themselves in a day after calling on students to retreat from protest sites in the Asia financial center amid fears of further violence, just hours after student leader Joshua Wong had called on supporters to regroup. ...